Yes, you certainly can. I got mine off ebay from a seller called
Myriad Exhausts. They are custom, stainless steel and you can get them slash cut, so they retain the look of the 197.
Just make sure you measure the tip diameter first and specify this when ordering: I ordered the generic 197 tips and they were too big, so had to exchange them - which the seller was very cool about.
There are many others on ebay of course, however these were great and I can recommend them.